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3 years ago

If (a+b)² =10 and ab=1 then find a²+b²

Mathematics

1 answer:

wlad13 [49]3 years ago

5 0

Answer:

Step-by-step explanation:

so openeing the parenthesis we get

a2+2ab+b2=10

a2+2(1) +b2=10

a2+2+b2= 10

a2+b2=8

if my answer helps please mark as brainliest

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timofeeve [1]

Answer:

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Step-by-step explanation:

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3 years ago

a rectangular wall with a length of 10x and width of 20 x has a rectangular doorway with a length of 5x and a width of 2x. What

Shtirlitz [24]

Answer:

∴ The the surface area of the wall is $190x^{2} \ square\ unit$ .

Step-by-step explanation:

Given that,

The length of rectangular wall is $10x$ .

The width of rectangular wall is $20x.$

The length of doorway is $5x.$

The width of doorway is $2x.$

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Now,

The length of rectangular wall is $10x$ .

The width of rectangular wall is $20x.$

∴ Total surface area of a rectangular wall $= Length\ of\ wall\times Width\ of\ wall$

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The width of doorway is $2x.$

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Total surface area of doorway is $10x^{2} \ square\ unit$ .

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$=190x^{2} \ square\ unit$

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